Diego Garcia Lambas (Instituto de Astronomía Téorica y Experimental (IATE), Cordoba, AR)

Clustering and dynamics in low density regions and compact group halo masses.


ABSTRACT:   In this talk I will overview cosmic voids, the clustering and dynamics of intravoid galaxies and present weak lensing measurements of halos of compact groups. The analysis of redshift--space galaxy--galaxy clustering in cosmic voids provides mean pairwise peculiar velocities due to small galaxy/mass concentrations residing in these large--scale underdense regions. These studies add to WL halo masses derived for compact groups and to the dark matter distribution associated to small galaxy association in relative isolation.